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Science 13 February 2009:
Vol. 323. no. 5916, pp. 882 - 883
DOI: 10.1126/science.1169281
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Perspectives

GEOCHEMISTRY:
Probes of the Ancient and the Inaccessible

Franck Poitrasson

Iron isotopes may be witnesses of the interplanetary impact that formed the Moon or probes of processes occurring at Earth's core-mantle interface.

Laboratoire d'étude des Mécanismes de Transfert en Géologie, Centre National de la Recherche Scientifique, Université de Toulouse, Institut de Recherche pour le Développement, 14 Avenue Edouard Belin, 31400 Toulouse, France. E-mail: franck.poitrasson{at}lmtg.obs-mip.fr

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Science. ISSN 0036-8075 (print), 1095-9203 (online)